Title:
【発明の名称】位相制御回路
Document Type and Number:
Japanese Patent JPH05507184
Kind Code:
A
Abstract:
A phase control circuit for controlling the relative phase of periodic components of two logic signals having the same frequency, and one of which periodic components has a pulse-duty factor different from 50:50, said circuit includes a signal source which provides a control signal for regulating the relative phase of the periodic components of said logic signals. The control signal has a first value for phase relationships in a predetermined range of values and a second value for phase relationships outside said range of values. A phase lock detector detects the lock status of the periodic components of the logic signals. Another signal source provides a third logic signal having a periodic component having the same frequency as the periodic component of each of the two logic signals and a pulse width substantially wider than that of the two logic signals. A switch is actuated by the phase lock detector and applies the third logic signal to the signal source when the two logic signals are out-of-lock whereby the control signal has the first value when the two logic signals are phase locked and the second value when the two logic signal are not phase locked.
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Inventors:
Coublitz, Rudolph
Lenz, Kuno
Lenz, Kuno
Application Number:
JP50792791A
Publication Date:
October 14, 1993
Filing Date:
April 19, 1991
Export Citation:
Assignee:
Deutscher Thomson-Brant Gezershyaft Mitt Besilyenktel Haftung
International Classes:
H03L7/10; H03L7/107; H03L7/191; H04N5/06; H04N5/12; H03L7/089; H03L7/095; (IPC1-7): H03L7/107; H04N5/06; H04N5/12
Attorney, Agent or Firm:
Toshio Yano (2 outside)